نتایج جستجو برای: dose estimates
تعداد نتایج: 485027 فیلتر نتایج به سال:
background: for radiotherapy of total skin including sub-cutaneous tissue up to a depth of 3 cm on the entire left leg of an adult (angiosarcoma skin), a complex treatment with multiple stationary electron fields was planned at our clinic. the details of dosimetry, clinical dose measurements are presented. materials and methods: the treatment planned with 6 overlapping 9 mev electron fields in ...
introduction: skin sparing is one of the most desirable characteristics of high energy photon beams. however, the photons emerging from the target of linacs are contaminated by secondary electrons as a result of their interactions with air, collimators, flattening filter and any other objects in their path. this phenomenon tends to increase the skin dose received b...
introduction: the aim of present study was to estimate effective dose from most common procedures performed in nuclear medicine departments of golestan province. methods: data of nuclear medicine procedures performed in 2 nuclear medicine departments in golestan province were collected during 4 years. effective dose, collective effective dose and effective dose per examination were calculated u...
BACKGROUND Estimates of radiation-related second cancer risk among Hodgkin lymphoma survivors are largely based on radiation therapy (RT) fields and doses no longer in use, and these estimates do not account for differences in normal tissue dose among individual patients. This study gives individualized estimates for the risks of lung and female breast cancer expected with contemporary involved...
UNLABELLED 11C-Acetate is currently being investigated as a new tracer for imaging neoplasms, most notably prostate cancer and its metastases. Previously reported dose estimates for (11)C-acetate prepared by the Oak Ridge Institute for Science and Education (ORISE) were based on a simple 3-compartment model in which all activity not measured in blood or excretion via breath was assumed to resid...
The models used in the NRC approach to assess chronic atmospheric releases of radioactivity generate deterministic dose estimates by using standard assumptions about exposure conditions and environmental transport mechanisms. This approach has been used at the Savannah River Site since 1983. Total dose to off-site maximum individuals at the SRS from atmospheric releases has been on the order of...
in 1974, the world health organization (who) established the expanded program on immunization (epi) to ensure that all children have access to routinely recommended vaccines. since then, global coverage with the four core vaccines (bacille calmette guérin vaccine [for protection against tuberculosis], diphtheria-tetanus-pertussis vaccine [dtp], polio vaccine, and measles vaccine) has increased ...
Background An increased risk of breast cancer following radiotherapy for Hodgkin lymphoma (HL) has now been robustly established. In order to estimate the dose-response relationship more accurately, and to aid clinical decision making, a retrospective estimation of the radiation dose delivered to the site of the subsequent breast cancer is required. Methods For 174 Dutch and 170 UK female pat...
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